Geochemistry of clathrate-derived methane in Arctic Ocean waters
Alterations to the composition of seawater are estimated for microbial oxidation of methane from large polar clathrate destabilizations, which may arise in the coming century. Gas fluxes are taken from porous flow models of warming Arctic sediment. Plume spread parameters are then used to bracket th...
Published in: | Geophysical Research Letters |
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Lawrence Berkeley National Laboratory
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Online Access: | https://doi.org/10.1029/2010GL043369 https://digital.library.unt.edu/ark:/67531/metadc1012696/ |
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ftunivnotexas:info:ark/67531/metadc1012696 2023-05-15T14:52:29+02:00 Geochemistry of clathrate-derived methane in Arctic Ocean waters Elliott, S.M. Reagan, M.T. Moridis, G.J. Cameron-Smith, P.J. Lawrence Berkeley National Laboratory. Earth Sciences Division. 2010-03-15 L12607 Text https://doi.org/10.1029/2010GL043369 https://digital.library.unt.edu/ark:/67531/metadc1012696/ English eng Lawrence Berkeley National Laboratory rep-no: LBNL-3389E grantno: DE-AC02-05CH11231 doi:10.1029/2010GL043369 osti: 983246 https://digital.library.unt.edu/ark:/67531/metadc1012696/ ark: ark:/67531/metadc1012696 Journal Name: Geophysical Research Letters; Journal Volume: 37; Journal Issue: 12; Related Information: Journal Publication Date: 2010 Oxidizers 58 Oxidation Clathrates Efficiency Seawater Ecosystems Abundance Oxygen Nutrients Methane Flow Models Dilution Recycling Transition Elements Ecology Nitrogen Removal Carbon Dioxide 54 Geochemistry Arctic Ocean Plumes Article 2010 ftunivnotexas https://doi.org/10.1029/2010GL043369 2019-07-20T22:07:55Z Alterations to the composition of seawater are estimated for microbial oxidation of methane from large polar clathrate destabilizations, which may arise in the coming century. Gas fluxes are taken from porous flow models of warming Arctic sediment. Plume spread parameters are then used to bracket the volume of dilution. Consumption stoichiometries for the marine methanotrophs are based on growth efficiency and elemental/enzyme composition data. The nutritional demand implied by extra CH{sub 4} removal is compared with supply in various high latitude water masses. For emissions sized to fit the shelf break, reaction potential begins at one hundred micromolar and falls to order ten a thousand kilometers downstream. Oxygen loss and carbon dioxide production are sufficient respectively to hypoxify and acidify poorly ventilated basins. Nitrogen and the monooxygenase transition metals may be depleted in some locations as well. Deprivation is implied relative to existing ecosystems, along with dispersal of the excess dissolved gas. Physical uncertainties are inherent in the clathrate abundance, patch size, outflow buoyancy and mixing rate. Microbial ecology is even less defined but may involve nutrient recycling and anaerobic oxidizers. Article in Journal/Newspaper Arctic Arctic Ocean University of North Texas: UNT Digital Library Arctic Arctic Ocean Geophysical Research Letters 37 12 n/a n/a |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Oxidizers 58 Oxidation Clathrates Efficiency Seawater Ecosystems Abundance Oxygen Nutrients Methane Flow Models Dilution Recycling Transition Elements Ecology Nitrogen Removal Carbon Dioxide 54 Geochemistry Arctic Ocean Plumes |
spellingShingle |
Oxidizers 58 Oxidation Clathrates Efficiency Seawater Ecosystems Abundance Oxygen Nutrients Methane Flow Models Dilution Recycling Transition Elements Ecology Nitrogen Removal Carbon Dioxide 54 Geochemistry Arctic Ocean Plumes Elliott, S.M. Reagan, M.T. Moridis, G.J. Cameron-Smith, P.J. Geochemistry of clathrate-derived methane in Arctic Ocean waters |
topic_facet |
Oxidizers 58 Oxidation Clathrates Efficiency Seawater Ecosystems Abundance Oxygen Nutrients Methane Flow Models Dilution Recycling Transition Elements Ecology Nitrogen Removal Carbon Dioxide 54 Geochemistry Arctic Ocean Plumes |
description |
Alterations to the composition of seawater are estimated for microbial oxidation of methane from large polar clathrate destabilizations, which may arise in the coming century. Gas fluxes are taken from porous flow models of warming Arctic sediment. Plume spread parameters are then used to bracket the volume of dilution. Consumption stoichiometries for the marine methanotrophs are based on growth efficiency and elemental/enzyme composition data. The nutritional demand implied by extra CH{sub 4} removal is compared with supply in various high latitude water masses. For emissions sized to fit the shelf break, reaction potential begins at one hundred micromolar and falls to order ten a thousand kilometers downstream. Oxygen loss and carbon dioxide production are sufficient respectively to hypoxify and acidify poorly ventilated basins. Nitrogen and the monooxygenase transition metals may be depleted in some locations as well. Deprivation is implied relative to existing ecosystems, along with dispersal of the excess dissolved gas. Physical uncertainties are inherent in the clathrate abundance, patch size, outflow buoyancy and mixing rate. Microbial ecology is even less defined but may involve nutrient recycling and anaerobic oxidizers. |
author2 |
Lawrence Berkeley National Laboratory. Earth Sciences Division. |
format |
Article in Journal/Newspaper |
author |
Elliott, S.M. Reagan, M.T. Moridis, G.J. Cameron-Smith, P.J. |
author_facet |
Elliott, S.M. Reagan, M.T. Moridis, G.J. Cameron-Smith, P.J. |
author_sort |
Elliott, S.M. |
title |
Geochemistry of clathrate-derived methane in Arctic Ocean waters |
title_short |
Geochemistry of clathrate-derived methane in Arctic Ocean waters |
title_full |
Geochemistry of clathrate-derived methane in Arctic Ocean waters |
title_fullStr |
Geochemistry of clathrate-derived methane in Arctic Ocean waters |
title_full_unstemmed |
Geochemistry of clathrate-derived methane in Arctic Ocean waters |
title_sort |
geochemistry of clathrate-derived methane in arctic ocean waters |
publisher |
Lawrence Berkeley National Laboratory |
publishDate |
2010 |
url |
https://doi.org/10.1029/2010GL043369 https://digital.library.unt.edu/ark:/67531/metadc1012696/ |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Journal Name: Geophysical Research Letters; Journal Volume: 37; Journal Issue: 12; Related Information: Journal Publication Date: 2010 |
op_relation |
rep-no: LBNL-3389E grantno: DE-AC02-05CH11231 doi:10.1029/2010GL043369 osti: 983246 https://digital.library.unt.edu/ark:/67531/metadc1012696/ ark: ark:/67531/metadc1012696 |
op_doi |
https://doi.org/10.1029/2010GL043369 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
12 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766323718617825280 |